![]() ![]() To find the documents with “very” and “fast” > SINTER very fast To query our tiny full-text search index, we will use the SINTER command (set intersect). > SADD redis ex1įor clarity, we’ve split this up into individual commands, but all the commands would normally be atomicly executed with a MULTI/EXEC block. To do this, we’ll make a set for each word and then put the document set names as members. Next we need to invert this index and show which word is located in which document. We’ve also turned all the words lowercase. Notice that we’re giving each line its own set (ex1…) and then we’re adding multiple members to that set based on each word (even though it might looks we’re just adding the entire line, SADD is variadic, so accepts multiple members. Let’s break down these items into sets of words just limited by space for simplicity: > SADD ex1 redis is very fast But on the contrary, Redis can be used to underpin a very novel full-text search engine. Let’s say you want to search a number of text documents-this may not be an obvious use case for Redis as it access via keys rather than tables. Additionally, this pattern is very interesting and can be generalized to other workloads for which RediSearch may not be ideal. However, in some environments, RediSearch is not available. The RediSearch module provides much higher performance than this pattern. Prior to the advent of modules, full-text search was implemented using native Redis commands. Full text search is commonly used in databases, search engines, content management systems, and other applications that require efficient and accurate searching of large volumes of text-based data. Unlike traditional search methods that rely on simple matching of keywords, full text search takes into account the context, synonyms, and word proximity to provide more relevant search results.įull text search engines use algorithms to index the content of documents or data sources, and allow users to query the index using natural language queries or Boolean operators to filter and refine results. Back to Glossary What is Full Text Search?įull text search is a technique used in information retrieval that allows searching for documents or data based on the presence of keywords or phrases within the entire text of the document. ![]()
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